[gertoja]

I'm sure this has been done 7 million times.

All props are attracted to each other. Distance and size apply. Console cvar ggravity_multiplier affects the effect. Rollermines and some vehicles are also affected.




Download:
garrysmod.org and Steam Workshop.

[skullorz]

I suggest a tool where you can make single props act like planets, with sliders for gravitational force strength and distance.